1. Impossible to stop, alter, or resist; inevitable: an inexorable fate; an inexorable law of nature.
2. Not capable of being persuaded by entreaty; relentless: an inexorable opponent.
[Latin inexōrābilis : in-, not; see IN-1 + exōrābilis, pliant (from exōrāre, to prevail upon : ex-, intensive pref.; see EX- + ōrāre, to argue).]
in·ex′o·ra·bili·ty, in·exo·ra·ble·ness n.
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2018 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Indo-European & Semitic Roots Appendices
Thousands of entries in the dictionary include etymologies that trace their origins back to reconstructed proto-languages. You can obtain more information about these forms in our online appendices:
The Indo-European appendix covers nearly half of the Indo-European roots that have left their mark on English words. A more complete treatment of Indo-European roots and the English words derived from them is available in our Dictionary of Indo-European Roots.